First Appearance Comics and Games
During his panel at C2E2, a fan asked Stan Lee if he will have a cameo in Guardians of the Galaxy. He confirmed he will, but said he had no idea what was going on during the scene or why it was happening, but is filmed with a beautiful woman. He joked fans will have to explain it to him after they see the scene.
I could have sworn I saw him in one of the teasers for it, but it could have been another movie.
Regardless, this is awesome.
he will always be included nothing new really.